PNR vs POOL: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

Reading it: PNR is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. PNR and POOL share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined PNR and POOL exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

Pentair plc is a roughly $4 billion revenue water treatment and flow company that most consumers know through its Pool segment, which makes pumps, filters, heaters, automation, and sanitization gear for residential and commercial swimming pools. Beyond pools, the Water Solutions segment sells residential and commercial water treatment (softeners, filtration, and quality systems) plus, after a January 2026 reorganization, the residential and irrigation flow business, while the Flow segment covers industrial, agricultural, and municipal pumps and fluid-handling equipment. As of July 2026 Pentair carries a market capitalization near $12 billion and trades around the high $70s, well off its 52-week highs above $110.

Full PNR guide

Pool Corporation (Nasdaq: POOL) is the largest wholesale distributor of swimming pool and related outdoor-living products in the world, operating roughly 455 sales centers across North America, Europe, and Australia and distributing more than 200,000 products to about 125,000 wholesale customers. Its catalog spans pumps, filters, heaters, cleaners, chemicals, repair parts, plus irrigation and landscape-maintenance goods, and it primarily sells to pool builders, retailers, and service professionals rather than consumers. A large share of demand comes from non-discretionary maintenance and repair of the existing installed base of pools, which gives the business a recurring, weather- and season-driven revenue stream on top of the more cyclical new-pool-construction and renovation segments.

Full POOL guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• PNR drivers: Pool as the profit and growth engine; Transformation and margin expansion.
• POOL drivers: Recurring maintenance demand; Distribution scale and share gains.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: Pool and water-treatment demand is cyclical and sensitive to housing activity, discretionary spending, and interest rates, and new-pool construction has been soft, which pressures volumes. For POOL, new pool construction and remodel demand are discretionary and highly sensitive to housing turnover, consumer confidence, and interest rates, so a prolonged high-rate or weak-housing environment can keep the cyclical segment depressed.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick PNR if you believe its drivers more; POOL if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the PNR and POOL guides.

PNR. Pentair trades around the high $70s in July 2026, well below its 52-week high above $110, at roughly 19 times earnings with a dividend yield near 1.4 percent. Revenue has grown only modestly (Q1 2026 sales up about 3 percent to roughly $1.04 billion), so the earnings story is powered by margin expansion and price rather than volume. The valuation reflects a quality industrial compounder whose growth has cooled, leaving investors to judge whether margins and pool demand hold up.

POOL. POOL posted FY2025 net sales of about $5.3 billion and net income near $406 million, and Q1 2026 sales rose roughly 6% to about $1.14 billion with EPS ahead of expectations. Management guided 2026 diluted EPS to roughly $10.85 to $11.15, reflecting expectations for modest sales growth. The stock trades at a mid-teens trailing earnings multiple, well below its pandemic-boom peak valuation.

Headline figures (approximate, July 2026): PNR shows revenue (ttm) ~$4.1B, q1 2026 sales ~$1.04B (up ~3%), adjusted eps (2025) ~$4.86, 2026 adjusted eps guidance ~$5.30 to $5.40; POOL shows revenue (fy2025) ~$5.3B, net income (fy2025) ~$406M, q1 2026 net sales ~$1.14B (up ~6%), market cap ~$6.6B.

PNR and POOL are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined PNR and POOL exposure against your real portfolio. It is not an investment adviser.